You risk too many things at low temperatures, such as molds. The yeast and bacteria in GT are of a type that loves higher heat (70-85 degrees). I've found it does well at around 80 with overhead heat that encourages bacteria growth rather than a heating pad that encourages yeast growth.

GT enlightened will grow a scoby. Personally I didn't have the best of luck with it; it grew slowly for me and was slow to ferment in comparison to a scoby that had been created from the 'pre change' formula. However I have heard others say they are successfully using a scoby from GT's enlightened and it is working well for them. Since the main reason for the 'enlightened' formula was to alter the culture to be less likely to produce alcohol after bottling, I prefer the 'old school' formula.

If the stuff on the shelves now is the enlightened then yes it does work, that's how I grew mine, and its 4 gal batches at a time now :-)

Edit: just wanted to add (forgive me its morning lol) I looked for the ones with the most culture grown in the bottle. Then i brought it home and simply took the caps off and coffee filtered the top with an elastic band. I let them grow in the bottle til the co2 was pushing them up into the bottle neck and by that time it was pretty vinegary. I plopped both scobies into a 2L juice jug and gave them a new batch of tea, with a bit less than the usual 1 cup to 1 gal sugar ratio (meaning just under half a cup for 2L) and let them go for about a week. The KT wasnt very good quality at first while they grew, but once I had a solid scoby formed, it just got better with each batch.

So in short, yes it works with the enlightened if thats the only thing on the shelves now lol

Interesting. Will have to try molasses.
I'm just starting out. 2 weeks I started my first SCOBY from a bottle of GT's. I made it in a quart mason jar and had about 1 cup of sugar in the mix. In 14 day it looked like this. It's in a gallon container now with 2 cups sugar. The scoby sank the first day and then floated to the top over the next 2 days. 5 days now and the biofilm has extended to cover the whole top. Here are pics from before I transfered the SCOBY.